
* {
    padding: 0;
    margin: 0;
}

.layui-btn {
    background-color: #2F4056;
}

body {
    margin-top: 10px;
    background-color: #F6F7F9;
}

#url {
    width: 100px;
    height: 100px;
    margin-top: 50px;
}

#courseUrl {
    width: 300px;
    height: 200px;
    margin: initial;
}

.layui-left {
    float: left;
}

#courseIntro {
    resize: none;
}

#test {
    margin-left: 120px;
    margin-top: -45px;
}

#video {
    margin-top: -45px;
    margin-left: 200px;
}

#videoPreview {
    margin-left: 112px;
}

#btn {
    margin-left: 42%;
}
